Furnace.



G. R; HAEGH & J. RFORTUNB.

FUHNAB.

' APPLICATION FILED MAILIB. 1909. 97 3,65%. Patented om, 2.5 1910.

2 SHB'ETSWSHEE'I' l.

G. B.. HAIGH J. R.FORTUNE.

I FUBNAQB. l

APPLICATION FILED HAR. 18 190B.`

Patented Oct. 25, 1910.

2 SBEETS-BHEET Z.

trasse.

UNITEDfsTATEs Iii/TENT OFFICE.

maar .n. Haren .AND -JoIIN n. FORTUNE, ornETROIT, MICHIGAN, AssIGNOns To MURPHY IRON WORKS.' OF DETROIT, MICHIGAN, a CORPORATION or' MICHIGAN.

FURNACE.

Speccation of Letters. Patent.

Patented oef. '25,' 1910.'

17e-all Iwhom 'itmay concern.-

it `kno,wn that we, GILnERT R. HAIGH andl JOHN R.' FORTUNE, citizens of the United States, of America, residing .at Detroit, -in 4the county of vWa ne and State of Michin an, .have invente ,certain new and useful mprovementsin Furnaces, fof whch the following is a s ecication,reference being had, therein' toit e accom 'anying drawings. In smoke-consumin rnaces and espel -ciallyfsuch :furnaces w erethe'fuel isauto.-

matically fed Onto inclined grates after .be-l ing 'subjected to a cokin process to liberate its volatile gases, itisound that some of 4the gases lescape `into the boiler chamber unburned owingto the' lackof'proper vadmirilture with air and more or 'less smoke is therefore emittedfrom the stack due to this incomplete combustion of the fuel.

'Ihe Object-'Spf Athis invention is to so con-H struct a furnace off-this .class as toiinsure a reference being had to the proper 'admixture'fof--gthe 'air and gases by causing a swirlingA action thereof in the fur nace before they reachthe boiler chamber; .and further to "so construct the furnace as .to prevent injury thereto'due Ato the extreme heat, =y providing for-freeexpansion of the inner, in' relation to theout'er arch..

To this end theinvention consist-sin the construction, arrangement andcombination 'of arts as hereinafter more fully described particularlyT pointed out inthe claims drawings, in which I .Figure 1 is a front elevation of a series of furnaces embodying the invention with parts broken away to show transverse Vsections thereof on the lines'-A--A and B-B of Fig. 2. :Fig 2-is a centrallongitudinal vertical section through the furnace and showing the saine` as applied'to a vertical typeof watertube boiler.' Fig. is a detail df tim-fun nace showing an enlarged sectional. plan i 'View thereof substantially on the line' G-C of Figs. 1 and 4; and Fig. 4 is a detail showing an enlarged sectionl of the same on the line 'D-D of Figs. 2 andB. l

bei'. 2.

As shown in Fig. 2 of the` drawings 1 vrepresents a boiler of the vertical water tube type which is su vorted and inelosed in the usual manner wit in the boiler cham- 3 is the furnace proper, located at the forwardside of the` boiler chamber and con accomp anying..

ing chamberor arch 4 `Into the boiler chamber an endof which vis located tlie h opens directly in the forward l-shape'd or innected thereto by an intelnediate connectclinedfire wall 5 adjacentto the rea-r. ends of lthe inclined rates 6 iof. the. furnace. Thesegrates are ormed in :the usual manner of lined and movable grate bars which aire supported at their upper endsadjacent .to the coking plates .7 from whichthey receive'fuel supplied from magazines 8, Suit. able'stoke'r boxes 9 being rovided beneath thefmagazi'nesl 8 to pusht e coal `from the cokingplates onto ythe inclined grate bars. These Stoker boxes are automatically oper.- ated by means of rockshaftsl@ to the outer which are in turn connected by. links l2 to' Kan actuatingbar 13 `extending vacross the .front- ;.o`f the furnace and reciprocated by any suitable means.

shafts 1-7 whichareactuated by arms 118.011'

their outerv ends connected reciprocating barl. y

The inner lside of .each magazine 8 is formed by an' archplate 19 having a ribbed seat 20 at itslower end for the y"inner arch by links to. the

'21 which Asprings 'across the furnace, and at.

upper end said arch plateis formed with' 'aseat for an outer arch 22, an airs ace 23 chambers by awal`1=24 formed by. a. row of bricks extending upwardacross' the. space near each side of the arch. The front wall 26' of the arch iscut a\va.j\ f.at 217 at each side of the furnace, and in the. plate 28 formingthe furnace front 'are iis-vided air Inlet Vopenings 29'A to admit air Into the space 23 between the inner and outer arches. These 'aircurrents enteringv at .29 after being distributed over the' linner arch te cool the same, escapedownward between the ribs on' the arch seat 20- of .the arch plates 19 into thefurnaCf-directly over the inner edgesof the coking plates.-

The. fixed grate barsare-supported at their lowerI ends upon a- 'ends of which are connected crank `arms 11 `being provided between the two arcles. i ',luis air space 23 is 4divided into separatel The onstructionand arrangement of .the

parts of .the furnace proper thus far de- Y f scribedis old and well known and forms no i part of this in-vention.

Thejchamber 4 located between the rear lend of the furnace and theboiler chamber is provided Awith lan inner arch 30 and anv f outer arch 31 with an air space 32 between,

and these arches, are located a higher plane than the plane of the arches 2l and 22 of the furnace so that what may be termed 'a ste up arch is formed. The

inner end of t e arch 2l lforms an abrupt shoulder orangle 33.'

lIt is found that in furnaces of this con-y structiom-the' gases liberated in the coking process on the coking'plates along each side of the furnace willto someextent cling to i, v'the surface ofthe urnacearch and by reason of thel swift moving lrents will .be carried inward toward the.

heat and air' curlboiler chamber without being properly mixed with the air entering through the openingsin the arch seats 20. By forming au abrupt angle in the furnace arch and supplementing the furnace arch with a-second arch 30, the inrushing aircurrent-s in 4passingthe angle 33 will zberetarded and given a swirling motion within. the chamber 4 against the arch 30 which is 'heatedv to incandescence and thus the air and gases are thoroughly mixed and the combustible mixture ignited by contact with theincandescent arch before passing' into the boiler i chamber and thus the combustible elements of the fuel are completely burned and no.

perceptible amount o smoke will be emitted from the stack in the normal running of the furnace. l

A vertical wall 34 connects the inner end of the arch 21 .with the arch 30, an expansion space 35 being provided in said wall-between the'brich` forming the inner end of the arch.,21 and the next tier of brick above so that said arch may expand vertically when highly heated. To close this expansion space a tier of brickBG is provided which brick extend acrossthe expansion space 35 'dividing the air space '23 is so constructed -at its upper end and the bricks l25 are also also the end of the space 23 to close both spaces and at theup-per side of this tier 36 of brick'is an expansion space'S'T so that said tier may rise with the arch 21 when the same expands. .The air space 23 is thus e'fectually closed at itsinner end and at the same time the inner arch is'left to expand relatively tov the outer arch.' Thej partition or wall 2a that it doeswnot quite engage the outer arch flow of the `heat to'the boilerl would be the casei'f a' long arch'of the same 70v spaced a slight distance fr oi'ny the outerarch to provide for 'an expansion of the- 'innersp arch. A small space 38 is also left between the end of the wall 24:y and the tier of brick 36 to provide-forth@ ex ansion Vof the lnner arch longitudinally, sai arch bein free t0 expand in that direction, ow toi-t e .sth'ep-` 65 up in the arch which leaves lts endl 'f In this construction the eect of a ong arch is secured without -retardinlg'the free c `mbcr as height throughout its length was'elnployed. This construction of arch permits the heatfto get away rapidly and at the. same time'. causes a swirling and retardation of `the currents to thoroughly mixthe gases ndjl'li' nu.. l Vhat we claim as our invention ist-31 l. A furnace comprising an inner 4and outer arch extending over-"a -ire chamberzA -with an air space betweenv said..arches,;awall 86' to close one end of said-air space. withan expansion space between said walll 'and' said inner arch;A and means extending acro'ssthe .air space ad]acent to said'wall to' close theA expansionspace and' carried 8 5V arch to move therewith upon expansion. of said-arch. "-1 4 2. In afurnace'of the character?deribed` an intermediate chamber between-said bers of an'inner and an outer archxextonding over there chamber with an air.

mediate arch extendingvin'a horizontal, planel "3 'above the plane-of the innerre. arch, a vel-' ti-c'al wall' between the adjacent ends ofthe:- inner fire arch and the intermediate Varch 4withan expansion space between it andthe iup said inner arch, and aZ-course of brick car rled by the inner arch and extendingacross the air space". between the inner. and vouter archesa adjacent to- Vsaid Walls to closeeaid 'expansion space and-having` an expansion' 10'54 space between thez upper 'side of said course and the outer arch to permit free' movement of the saidcourse withthe inner arch upon expansion of said arch. `In testimony whereof we aiiix our signa- 1-10 tures in presence of two witnesses.-

GILBERT R. HAIGH.

JQHN R. FORTUNE.- lVit'nesses: CHESTER M. Cumm,

' Rose M. CONRAD.' 

